Rotary steam-engine



(No Model.) l 2 Sheets-Sheet 1.

L. A. WISOHMEYER. ROTARY STEAM ENGINE.

(No Model.) 2 Sheets- Sheet 2-.

L. A. WISOHMEYER.

EOTAEY STEAM ENGINE.

150.595,565. y Patented Deo. 14,1897.

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WITNESSEE NVENTDR of l l UNITED STATES PATENT OFFICE.,

LOUIS A. WISOHMEYER, OF NORTH DOVER, OHIO.

ROTARY STEAM-ENGIN E.

SPECIFICATION forming part of Letters Patent No. 595,665, dated December 14, 1.897.

Application led March 5, 1897.

To all whom it may concern.-

Be it known that I, Louis A. WISCHMEYER, a citizen of the United States, residing at North Dover, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Rotary Steam-Engines; and I do hereby declare the following to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in rotary steam-engines in which steam can be used expansively; and the objects of my improvement are to provide simple and reliable means enabling the direct application of the compounding principle lin one cylinder as well as in a number of connected cylinders. I attain these objects in a motor substantially as illustrated in the accompanying drawings, in which- Figure 1 represents a plan View of said motor, the cover being removed. Fig. 2 is a central sectional view of the same, and Fig. 3 is a transverse sectional view. (See Fig. l.) Fig. l represents a plan view of a tandem compound application of said motor. Fig. 5 represents a cross compound application of same, and Fig. 6 is a front elevational view of said cross compound motors.

Like letters of reference denote like parts in the drawings and specification.

The motor as a unit substantially consists of the cylinder A, the piston B, the steamchest C, valve D, cover E, and cylinder-heads F and Gr. (See Figs.1, 2, and 3.) The cylinder proper receives the piston, as shown in Fig. 2, and the steam-chest C, Which is shown as an integral part of said cylinder, may be attached as a separate part of said cylinder, if so preferred. At H the inlet is had to said steam-chest, and designed for the outlet of steam is the port I, the latter penetrating the face of said chest and extending below said face to either the side or end of said steamchest, and arranged diagonally opposite are the ports K and L in open relation With the steam-chest and the interior of the cylinder, as seen in Figs. 1 and 3. Opposite the abovementioned ports is a secondary return-port M, of which the terminals intersect the bore of the cylinder, as shown in Fig. 3. The

Serial No. 626,062. (No model.)

course of said port M extends diagonallyy across the cylinder below the port I. (See Figs. l and 2.) The ports K, L, and M intersect the cylinder in tangent relation to its bore .or approximately so, as seen in Fig. 3. The former two of the ports are under control of vthe valve D, while the latter is ever ready for conveyance of steam from one end of the cylinder to the other, as hereinafter referred to.

The valve D serves in the nature of a housing upon and in steam-tight contact with the face of the steam-chest. The form and size of said valve or housing are such as to require but limited lateral movement in order to leave one or the other of the ports K L exposed to the interior of the steam-chest, the exhaustport remaining at the same and at all times within the limits of the cavity a of said housing, as seen in Figs. l and 3. The shifting of the valve is effected by means of the rod O, which is secured to said valve and extended through the side of the steam-chest, substantially in the manner as shown in Fig. l.

The piston B is steam-tightly fitted Within the bore of the cylinder between the heads F and G thereof. Two distinct series of furrows or cavities b b' are formed along and symmetrically divided around the periphery of said piston, five of which are shown to each side of the partition c. More or less, however, maybe used Without departing from the nature of the invention.

The piston B is journaled in trunnions, one of Which, d, extends through the stufiing-box of the head F, and the other, c, is guided in the rear :head G. Al pulley or gear-Wheel may be placed upon the trunnion d,or the same may serve vas a direct driver of many kinds of machines, dynamos, propeller-screws, &c. The direction in which the wheel is to revolve is governed by the position ofthe valve D, respectively by the port, which is left in open relation with the steam-chest. As shown, steam can enter through the port K and the wheel will thus revolve in the direction as indicated by the arrow. (See Fig. 3.) Successively the furrows or cavities are turned or pushed into the path of the said port K, and thus cause the piston B to revolve. Through port M the steam is conveyed from the pockets b to b', from where it reaches the IOO port L and the cavity of the valve for being exhausted through port I. Steam entering any of the pockets is thus repeatedly applied before same can leave the cylinder, and depending upon the initial pressure of steam there may be two or more cylinders so connected as to receive steam one from the other until all of the available pressure is converted into energy of rotative nature.

Fig. 4 illustrates a tandem compound application of two cylinders constructed Substantially as above described, and Figs. 5 and G illustrate a cross compound application of two cylinders in plan and elevational views. The trunnion of each of the pistons may be used independently or connected by gearwheels P P, as shown.

In the tandem compound application of the cylinders a wheel or the pulley A may servo the double purpose of a coupling for the pistous and as a means for conveying power (motion) therefrom. 4

It is preferred to connect the valveste1ns substantially in the manner as shown in Figs. l and 5 to effect a simultaneous shifting thereof for the purpose of changing the course of rotation. The lever F in Fig. 5 can be shifted from g to 7L to change the course of rotation of the pistons, and a mere turning of the crank t', Fig. 4, will cause a similar ei'l'ect upon or with the tandem compound motors shown in that iigure. The location of the ports leading to and from the steam-chest may be at the sides and ends, as shown in Fig. 4, or they may be at opposite ends, as shown in Fig. 5.

In compound motors the cylinders are e1;- larged successively, either in length, as indicated by the dotted lines 7a 7c, or a larger (increasing) diameter may be used for the second and third cylinders.

That I claim is- In a rotary steam-engine, a cylinder, the ports K, L, M, arranged in the relation to each other, as shown, combined with a slidevalve which is adapted to alternately close a Aport at diagonally-opposite corners of the steam-el1est, and a rotary piston provided with two separate sets of cavities, and which cavities communicate with two sets of ports, substantially as shown.

In testimony whereof I afiix my signature in presence of two witnesses.

LOUIS A. VISCIIMEYER.

lVitnesses:

BERNH. F. EIBLER, ALF. P. ELTEN. 

